tda9981ahl/8/c1xx NXP Semiconductors, tda9981ahl/8/c1xx Datasheet - Page 19

• Manufacturer Part Number: tda9981ahl/8/c1xx
• Description: Hdmi Transmitter Up To 150 Mhz Pixel Rate With 3 ? 8-bit Video Inputs And 4 ? I 2s-bus With S/pdif
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA9981A_1
Product data sheet
8.10 I
8.6 Color space converter
8.7 Downsampler
8.8 Audio input format
8.9 S/PDIF
The color space converter is used to convert input video data from one type to another
color space (RGB to YC
coefficient is programmable via the I
This block works only with YC
signals by a factor 2. A delay is added on the G/Y channel, which corresponds to the
pipeline delay of the filters, to put the Y channel in phase with the C
The TDA9981A is compatible with HDMI 1.2a (DVD support). The TDA9981A can carry
audio in I
S/PDIF or I
used at a time: either S/PDIF or I
Table 15.
All audio ports are LV-TTL compatible.
The audio port AP6 is used for the S/PDIF feature. In this format the TDA9981A supports
2-channel uncompressed PCM data (IEC 60958) layout 0 or compressed bit stream up to
8 multichannels (Dolby Digital, DTS, AC-3, etc.) layout 1. The TDA9981A is able to
recover the original clock from the S/PDIF signal (no need for an external clock). In
addition it can also use an external clock (MCLK) to decode the S/PDIF signal.
The TDA9981A supports the NXP I
channels (AP1 to AP4), which enable 8 uncompressed audio channels to be carried. The
I
Audio port
AP0
AP1
AP2
AP3
AP4
AP5
AP6
AP7
ACLK
2
2
C
C
S-bus input interface receives an I
Y \G
S-bus
B
R
\R
\B
=
2
S-bus format (one stereo up to four stereo channels) or in S/PDIF format.
Audio port configuration
2
C
C
C
S-bus format can be selected via the I
11
21
31
C
C
C
12
22
32
I
WS (word select)
I
I
I
I
MCLK (master clock for S/PDIF)
S/PDIF input
AUX (internal test)
SCK (I
C
C
C
2
2
2
2
2
S-bus and S/PDIF input configuration
S-bus port 0
S-bus port 1
S-bus port 2
S-bus port 3
13
23
33
Rev. 01 — 19 May 2008
B
C
2
S-bus clock)
R
R\C
B\C
and YC
G\Y
B
C
B
R
R
2
S-bus.
input format; these filters downsample the C
+
2
2
2
S-bus format. There are four I
B
S-bus signal including serial data, word select and
C-bus register.
C
Oin
Oin
Oin
R
to RGB). This block can be bypassed and each
Table 15
R\C
B\C
G\Y
B
R
+
2
shows the audio port allocation.
Oout
Oout
150 MHz pixel rate HDMI transmitter
C-bus. Only one audio format can be
Oout
C
C
Y \G
B
R
\R
\B
2
S-bus stereo input
TDA9981A
B
-C
© NXP B.V. 2008. All rights reserved.
R
channel.
B
and C
19 of 40
R